Lactic acid bacteria from “Idly”, a traditional cereal pulse product of southern India, were evaluated for antimutagenic properties. Effect of their presence in Salmonella mutagenicity assay with foodborne mutagens like spice extracts, amino acid pyrolysates, and aflatoxins was examined. Variation of antimutagenic potential at different growth stages of these lactic acid bacteria was examined in time-course studies. The enzyme profile was examined to determine any possible relationship between antimutagenicity and enzymes in these lactic acid bacteria. Most of the lactic acid bacteria tested were found to decrease mutagenicities exerted by these mutagens significantly. Time-course studies showed that antimutagenic ability decreased in stationary phase of growth of lactic acid bacteria. There was no correlation between antimutagenicity and enzyme profile quantifying proteolytic, lipolytic, and other enzymes of carbohydrate metabolism. Lactic acid bacteria from “Idly” were found to be effective in suppressing the mutagenicities of the kinds encountered in foods.

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